Gas-sensing characteristics of dielectrophoretically assembled composite film of oxygen plasma-treated SWCNTs and PEDOT/PSS polymer

被引：89

作者：

Jian, Jinming ^{[1
]}

Guo, Xishan ^{[1
]}

Lin, Liwei ^{[2
]}

Cai, Qiang ^{[3
]}

Cheng, Jie ^{[1
]}

Li, Jianping ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Biosyst Engn, Hangzhou 310058, Zhejiang, Peoples R China

[2] Univ Calif Berkeley, Berkeley Sensor & Actuator Ctr, Berkeley, CA 94720 USA

[3] Tsinghua Univ, Yangtze Delta Reg Inst, Jiaxing 314006, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2013年 / 178卷

基金：

中国国家自然科学基金;

关键词：

SWCNTs; PEDOT/PSS; O-2 plasma functionalization; Dielectrophoretic assembly; Gas sensing; WALLED CARBON NANOTUBES; SENSOR; TRIMETHYLAMINE; SENSITIVITY; POLY(3,4-ETHYLENEDIOXYTHIOPHENE); NANOCOMPOSITES; ENHANCEMENT; ARRAYS;

D O I：

10.1016/j.snb.2012.12.085

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The composite film with high gas sensing capability was synthesized through dielectrophoretic assembly of nanostructured layer of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS) matrix and O-2 plasma-treated single-walled carbon nanotubes (SWCNTs). Characterizations of the PEDOT/PSS-SWCNTs composite were carried out by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), and field emitting scanning electron microscope (FE-SEM). The results showed that oxygen-containing functional groups were grafted on the SWCNTs surface by O-2 plasma treatment. The functionalized SWCNTs homogeneously dispersed in the PEDOT/PSS matrix by pi-pi interaction and electrostatic attraction between PEDOT chains and the nanotubes. The SWCNTs concentration affected the gas-sensing properties of the composite film via the induced morphological and conductive variation. The conductive and gas-sensing characteristics of the composite film were improved by aligning the functionalized-SWCNTs in the polymer and forming the nanostructured film surface using dielectrophoretic manipulation. The gas sensors based on the optimally dielectrophoresis-assembled composite film showed high sensitive, selective, rapid, stable and reversible responses for detection of 2-300 ppm NH3 and 6-1000 ppb trimethylamine gases at room temperature, suggesting its potential for assessing fish freshness in the fishery chain. (c) 2013 Elsevier B.V. All rights reserved.

引用

页码：279 / 288

页数：10

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